JavaScript Garden

JavaScript Garden is a growing collection of documentation about the most quirky parts of the JavaScript programming language. It gives advice to avoid common mistakes and subtle bugs, as well as performance issues and bad practices, that non-expert JavaScript programmers may encounter on their endeavours into the depths of the language.

JavaScript Garden does not aim to teach you JavaScript. Former knowledge of the language is strongly recommended in order to understand the topics covered in this guide. In order to learn the basics of the language, please head over to the excellent guide on the Mozilla Developer Network.



Table of Content

Intro
Object Usage and Properties
The Prototype
hasOwnProperty
The "for in" Loop
Function Declarations and Expressions
How "this" Works
Closures and References
The "arguments" Object
Constructors
Scopes and Namespaces
Array Iteration and Properties
The "Array" Constructor
Equality and Comparisons
The "typeof" Operator
The "instanceof" Operator
Type Casting
Why Not to Use "eval"
undefined and "null"
Automatic Semicolon Insertion
The "delete" Operator
setTimeout and "setInterval"